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Glaciatas appeared as segregates out of plicata breeding which carried no anthocyanin pigments. The first white ones were referred to as ice-whites because of the purity of color. By 2003 they occurred in white, lemon and other shades of yellow, pink, salmon and orange.
Bulletin of the American Iris Society, July 2003 - Plicatas, Luminatas, and Glaciatas - Based on Postings Originally Made on Iris-Talk by Keith Keppel, Oregon, p. 51-57.
Examples of glaciatas are the BBs 'Immortal' and 'Champagne Blush'.
-- Main.RPries - 2010-09-09